Drawing instrument



R. D. BECKER.

DRAWING INSTRUMENT. APPLICATION FILED 05c. I6, I919. RENEWED Nov.17.1921.

1,41 1 1 51 Patented Mar. 28, 1922.

. Drawing I p mgr'is a fulh clear,and:exact descriptlon.

UNITED: S ES PATENT" F C RUnoLPH 13mm, "or nnwyfoax; iv. Y.

inaAwINe INSTRUMENT.

lpplication-flled December 16,-1919,'Serial1(o 845,876.--RenewedNovember 17, 1921.

ToaZZ whom it may concern:

Be it known'that. I, RUDOLPH. "BriqKnn, a citizen of the UnitedStates,and a resident of the city of New York,1borough otMan- Jhattan,.in t the county "and State of 'New York, have invented anew andImproved Instrument, of which the followhis.invention relates to drawin.inst1'u ments, andhas forian objecttoprovide an .zimproved constructionof means ;used in .drawlngovalsielther with apen or pencil.

vprovision of a deformable men'1ber and;

Anotherobject ofJtheinventi-on is to provide an instrumentfor "guiding apen-or pencil in' drawing an oval which may be adjusted :to produce any'form of oval de sired.

A further objeet,*morespecifically, is the means for deforming the sameand then holding the member in its setposition While the scribing.instrument is guided thereby.

In the accompanying drawing:

Figure 1Zis a perspective view of an instrument disclosing an embodimentotthe invention.

Figure .2. is alongitudinal horizontal section through thelstructureshown in Figurel. j

Figure 3 isia longitudinal vertical, section through Figure 2 on lineFigure 4 is a view-similar to Figure 3 eX- -cept the parts areshowncollapsed or as- It will be observed plate 7 is formed with sections 8-and 9, said sections extending from the enclosure 6 to the opposite.edges of the casing whereby the ends of the resilient rule or guide 10may slidingly fit thereover as the end of the rule 10 is provided withapertures. The guide or rule 10 is made preferablyv from some resilientmetal, as for instance steel, and is provided Specification of LettersPatent.

allyto a downwardly to its lowered position.

10 in the desired. position noted that a set of an oval and when saidhalf has Patented Mar; 25, 1922.

with graduations 11 of any desired kind,

r and I also with a number of apertures 12' at the front end forpermitting the proper bowing 'ori, flexing when a comparatively smalloval is to be provided, The slide 5 has the' forward end 13 extendingthrough the guide 10 at the center to which it isriveted or otherwiserigidly secured slide moves the guide 10 will moving the slide backandforth long itudi .inally theraxis of the so that us the also niove.- By

ovalima'y be deter- 1111-11811. In order: to'vary 'oriregulate the width:ofthe' Oval the 'retaining plate 14 is .providedlhaving extensions" ateach "end through which rlvets or other pivotal securing means arepassed so that theplate Mmay freelyswing Within certain limits. Whentherparts arein the position shown inFigures 1*and'2 and it is desiredto provide a wider oval plate 14 is swung upwardly until thesame isdisengaged fromthe guide 10 and then-the guide. manually moved"laterpoint opposite the desired slot 16, after which the. plate 14 isagain moved Itwill be notedthat the plate. It isiprovided with anumber-of slots 16 forholdingithe guide It will also be graduations 17is arranged on the upperfface of theplate ltsothat'each side of theguide will be bowed to the same extent. Asshown in the drawing the sidesof theguide are bowed so as to be one inch from the center of the slide5, while theend 18 of theguide' is 'two'inches'from the plate 14, Thisarrangement provides for half of been applied to an'article the entireinstrument is reversed so as to make the other half of the Serial No.515,975.

so j

oval. This will result in providing an oval two inches Wide and fourinches long. Ordinarily the guide 10 and the slide 5 are grasped whenthe end 18 and the parts are slid back and forth until the desired sizeis secured, but if afine adjustment is de sired the wheel 3 is movedproperly.

.When in use the parts are assembled or collapsed to the position shownin Figure 4, wherein the frame 1 acts as a casing for the slide 5, guide10' and associate parts. If it should be desired touse the device whenin. the position shown in Figure 4 the plate 14 is first raised orthrownback and the guide 10 and slide 5 grasped near point 18 and thesemembers moved to approximately the position desired for securing thedesired preventing any accidental slipping of the duce any sized and any'fact, slightly more than instrument is then turned around desired oneor any scribed comprising a sized oval, plate 14 is then lowered and thesidesof the guide 10 are inserted in the desired slots 16, after whichthe parts are moved back and forth as cirmimstances d emand for securinga better adjustment. fine adjustment is secured by rotating wheel 3. Thedevice is then placed upon a construction line with the pointer 19touching the line and the line extending longitudinally beneath the slot20 in slide 5. ,A pencil.

or pen is thenplaced against the guide 10- and the desired markproduced. In order that an accurate oval may be secured the other halfof the 22 may instrument When scribing a line.

WhatIclaimiszfi v 1. An instrument of the character described comprisinga resilient strip acting as a guide, means for flexing said strip toproshaped oval, and a casing carrying said means and adapted to receivesaid strip when not in use. v

2. An instrument of the character demounted slotted plate at the frontof the easing, a bowed strip adapted to move inand out of the casingthrough certain of the slots in said plate, a guiding member in saidcasing 'posltioned'adjacent said slotted plate,

Said guiding member being formed with a slot, a slide loosely extendingthrough said guiding member and rigidly secured to said strip centrallythereof, and means for ad- 'justing said slide.

3. An instrument of the character described comprising a casing, a guidng casing, a I pivotally transverse bar arranged, in the casing, a stripof flexible material having openings at the ends n'herebysaidends mayslide over said bar, a pivotally mounted plate arranged at the end ofthe casing formed L-shaped in cross section having slots in one leg ofthe L adapted to accommodate said strip so as to space the sides of thestrip an equal :distance from a central line, and a sliding memberarranged centrally of the casing and rigidly securedv to said'stripcentrally thereof, said'slide and said plate being formed withgraduations.

at. An mstrument'of; theucharacter described comprising a casing, aresilient memher for forming half an oval, a slide longer than it isWide,.having a longitudinally arrangedslot, said slide being connectedwith the center of saidresilientmember for vary ing the contour thereof,a pointerconnected with said casing opposite the center of said slot,andv means carried by the casing for locking the side portions of theresilient member when formed: into proper. shape.

'5."An instrument of the character described-comprising a looped member.pro-:

ducing half an oval, said looped member being resilient, a casing, apivotally mounted plate having a number adapted to accommodate or saidlooped the side portions said looped member formed with a threadedjsection atthe end opposite that secured to 7 the looped member, saidthreaded section projecting into said enclosure, and a nut positioned onthe threaded section and arranged in said enclosure whereby when the nutis rotated said slide Willbeadjusted longitudinally fo varying thecurvature of the looped member. V

Y "RUDOLPH D. BECKER.

of slots therein L .75 member, a guiding bar arranged'in the casing for'guiding-theinner ends of said looped member, said bar' having anenclosure, a slide secured-to thecenter ofv

